Reference Guide

Table 35. Optional TLV Types (continued)
Type TLV Description
and mandatory (non-configurable) in the
LLDP-MED implementation.
127 Power via MDI Dell Networking supports the LLDP-MED
protocol, which recommends that Power
via MDI TLV be not implemented, and
therefore Dell Networking implements
Extended Power via MDI TLV only.
127 Link Aggregation Indicates whether the link is capable of
being aggregated, whether it is currently
in a LAG, and the port identification of
the LAG. The Dell Networking OS does
not currently support this TLV.
127 Maximum Frame Size Indicates the maximum frame size
capability of the MAC and PHY.
TIA-1057 (LLDP-MED) Overview
Link layer discovery protocol — media endpoint discovery (LLDP-MED) as defined by ANSI/ TIA-1057— provides additional
organizationally specific TLVs so that endpoint devices and network connectivity devices can advertise their characteristics and
configuration information; the OUI for the Telecommunications Industry Association (TIA) is 00-12-BB.
● LLDP-MED Endpoint Device — any device that is on an IEEE 802 LAN network edge can communicate using IP and uses
the LLDP-MED framework.
● LLDP-MED Network Connectivity Device — any device that provides access to an IEEE 802 LAN to an LLDP-MED
endpoint device and supports IEEE 802.1AB (LLDP) and TIA-1057 (LLDP-MED). The Dell Networking system is an LLDP-
MED network connectivity device.
Regarding connected endpoint devices, LLDP-MED provides network connectivity devices with the ability to:
● manage inventory
● manage Power over Ethernet (PoE)
● identify physical location
● identify network policy
LLDP-MED is designed for, but not limited to, VoIP endpoints.
TIA Organizationally Specific TLVs
The Dell Networking system is an LLDP-MED Network Connectivity Device (Device Type 4).
Network connectivity devices are responsible for:
● transmitting an LLDP-MED capability TLV to endpoint devices
● storing the information that endpoint devices advertise
The following table describes the five types of TIA-1057 Organizationally Specific TLVs.
Table 36. TIA-1057 (LLDP-MED) Organizationally Specific TLVs
Type SubType TLV Description
127 1 LLDP-MED Capabilities Indicates:
● whether the transmitting
device supports LLDP-
MED
● what LLDP-MED TLVs it
supports
● LLDP device class
458 Link Layer Discovery Protocol (LLDP)